/Engine/Source/Runtime/Core/Public/Misc/CoreDelegates.h
Callback when a single controller pairing changes
static [TMulticastDelegate](API\Runtime\Core\Delegates\TMulticastDelegate)< void(int32 ControllerIndex, [FPlatformUserId](API\Runtime\Core\Misc\FPlatformUserId) NewUserPlatformId, [FPlatformUserId](API\Runtime\Core\Misc\FPlatformUserId) OldUserPlatformId)> OnControllerPairingChange;